JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write tests before implementation

Create unit tests for a discount calculator covering edge cases and rounding.

Repo: analytics-core. Domain: fintech. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Write tests before implementation. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design audit tables

Design tables for tracking API events and change history.

Repo: ecommerce-backend. Domain: creator-tools. Analytics schema design.

Instruction: Design the tables or schema for: Design audit tables. Define keys, partitions, and audit columns.

Use surrogate keys, timestamps, source metadata, and clear fact/dimension separation.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Locate data fetching boundaries

A Next.js repo separates server actions, client components, and shared utilities.

Repo: ml-pipeline. Domain: ecommerce. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Locate data fetching boundaries. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.

UI path identified
state flow understood
files mapped


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Find hidden coupling

Inspect a Python package with utils, handlers, and workers; explain how retry logic affects job processing.

Repo: mobile-sdk. Domain: edtech. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Find hidden coupling. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.

correct entry point
correct data flow
relevant files identified


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: analytics-core. Domain: healthtech. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.

bug fixed
safe boundary handling
regression test suggested


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: auth-service. Domain: edtech. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.

clear contract
consistent errors
future-proof design


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose promise flow

A promise chain swallows the original error and returns a misleading success.

Repo: payments-api. Domain: edtech. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Diagnose promise flow. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.

root cause
verification steps
frontend-specific diagnosis


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan rate limiting

Add a rate limiter design that can scale across multiple workers.

Repo: dashboard-web. Domain: edtech. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Plan rate limiting. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design audit tables

Design tables for tracking API events and change history.

Repo: chat-agent. Domain: edtech. Analytics schema design.

Instruction: Design the tables or schema for: Design audit tables. Define keys, partitions, and audit columns.

Use surrogate keys, timestamps, source metadata, and clear fact/dimension separation.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Locate data fetching boundaries

A Next.js repo separates server actions, client components, and shared utilities.

Repo: dashboard-web. Domain: edtech. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Locate data fetching boundaries. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: chat-agent. Domain: infra. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose promise flow

A promise chain swallows the original error and returns a misleading success.

Repo: analytics-core. Domain: fintech. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Diagnose promise flow. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Handle empty payloads

A webhook handler crashes when the JSON body is empty. Make it resilient and return a proper error.

Repo: scheduler. Domain: saas. Python service uses Pydantic models, DB repositories, and unit tests.

Instruction: Patch the bug described here: Handle empty payloads. Return a minimal safe fix and mention any tests to run.

Add input validation, preserve backward-compatible behavior, and include a regression test for the broken edge case.

bug removed
edge case handled
regression test suggested


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Fix stale closure

A hook callback reads old state after rapid updates; patch it.

Repo: analytics-core. Domain: creator-tools. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Fix stale closure. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: payments-api. Domain: ecommerce. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.

repetition reduced
error handling
maintainability


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Understand schema relationships

A warehouse schema uses fact and dimension tables for subscriptions and events.

Repo: payments-api. Domain: developer-tools. Data warehouse with fact/dimension tables and scheduled jobs.

Instruction: Explain the data flow for: Understand schema relationships. Identify tables, joins, and transformation steps.

Trace source tables to staging, then to marts. Identify key joins, filters, and aggregation points.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: dashboard-web. Domain: healthtech. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a memoized component

An over-memoized component hides actual prop changes.

Repo: ecommerce-backend. Domain: ecommerce. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review a memoized component. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.

quality issues found
practical suggestions
frontend concerns


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace state across components

A React app manages auth state in context, hooks, and a small API layer.

Repo: scheduler. Domain: ecommerce. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Trace state across components. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: dashboard-web. Domain: developer-tools. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write tests before implementation

Create unit tests for a discount calculator covering edge cases and rounding.

Repo: mobile-sdk. Domain: saas. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Write tests before implementation. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.

edge cases covered
test names clear
deterministic behavior


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: dashboard-web. Domain: edtech. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Analyze hydration mismatch

A server-rendered page renders different timestamps on client and server.

Repo: ecommerce-backend. Domain: creator-tools. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Analyze hydration mismatch. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Locate data fetching boundaries

A Next.js repo separates server actions, client components, and shared utilities.

Repo: mobile-sdk. Domain: infra. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Locate data fetching boundaries. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: scheduler. Domain: fintech. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: chat-agent. Domain: creator-tools. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: auth-service. Domain: edtech. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review an API client

The client mixes transport errors and business errors in one catch block.

Repo: dashboard-web. Domain: infra. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review an API client. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: cms-platform. Domain: fintech. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Lock down behavior

Write tests for a password strength checker with explicit boundary conditions.

Repo: scheduler. Domain: ecommerce. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Lock down behavior. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan migration checks

Inspect tables, compare counts, run a diff query, and validate migration impact.

Repo: chat-agent. Domain: infra. Agent workflow over SQL files and validation queries.

Instruction: Create a tool-use plan for: Plan migration checks. Read schema, inspect query, run checks, and validate output.

Inspect schema first, isolate the grain, run a comparison query, then verify counts after the patch.

schema first
comparison query
verification


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: payments-api. Domain: developer-tools. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace missing rows

A dashboard shows missing records after a timezone conversion.

Repo: chat-agent. Domain: developer-tools. SQL pipeline and dashboard queries.

Instruction: Trace the data issue: Trace missing rows. Explain likely cause and how to verify the fix.

Check timezone conversion, join cardinality, and filters that remove expected rows.

root cause
data verification
metric consistency


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Reduce duplication

The repo has repeated validation logic in three endpoints; centralize it.

Repo: ecommerce-backend. Domain: healthtech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Reduce duplication. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.

behavior preserved
complexity reduced
tests updated


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: scheduler. Domain: healthtech. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace missing rows

A dashboard shows missing records after a timezone conversion.

Repo: ecommerce-backend. Domain: developer-tools. SQL pipeline and dashboard queries.

Instruction: Trace the data issue: Trace missing rows. Explain likely cause and how to verify the fix.

Check timezone conversion, join cardinality, and filters that remove expected rows.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a serializer

The serializer leaks internal IDs in API responses; propose a cleaner contract.

Repo: scheduler. Domain: developer-tools. Python backend with API handlers and background workers.

Instruction: Review the code for: Review a serializer. Call out risks and give a practical improvement plan.

Flag correctness, performance, maintainability, and security concerns. Recommend the smallest safe refactor.

risk identified
actionable fix
production awareness


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Test a formatter

Write tests for a date formatter that must respect locale and fallback rules.

Repo: cms-platform. Domain: edtech. JS testing stack with Vitest/Jest and React Testing Library.

Instruction: Write test cases for: Test a formatter. Start with the edge cases and expected behavior.

Cover input validation, boundary values, async states, and error rendering.

edge coverage
async behavior
clear expectations


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write query tests

Create validation cases for a revenue query with month boundaries.

Repo: payments-api. Domain: ecommerce. SQL validation and BI dashboards.

Instruction: Define tests/validation cases for: Write query tests. Include edge and boundary conditions.

Use small fixture tables and validate row counts, null handling, and date windows.

fixtures
edge cases
row-level expectations


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Reduce duplication

The repo has repeated validation logic in three endpoints; centralize it.

Repo: analytics-core. Domain: fintech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Reduce duplication. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: mobile-sdk. Domain: infra. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: mobile-sdk. Domain: fintech. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.

typed contract
clear ergonomics
extensibility


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a serializer

The serializer leaks internal IDs in API responses; propose a cleaner contract.

Repo: ecommerce-backend. Domain: healthtech. Python backend with API handlers and background workers.

Instruction: Review the code for: Review a serializer. Call out risks and give a practical improvement plan.

Flag correctness, performance, maintainability, and security concerns. Recommend the smallest safe refactor.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Fix stale closure

A hook callback reads old state after rapid updates; patch it.

Repo: auth-service. Domain: saas. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Fix stale closure. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: dashboard-web. Domain: fintech. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Analyze hydration mismatch

A server-rendered page renders different timestamps on client and server.

Repo: scheduler. Domain: infra. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Analyze hydration mismatch. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Fix duplicate aggregation

A query double-counts rows after joining two one-to-many tables.

Repo: ecommerce-backend. Domain: edtech. SQL analytics pipeline with reporting queries.

Instruction: Fix the query issue: Fix duplicate aggregation. Explain the bug and provide the corrected pattern.

Deduplicate before aggregating, use correct grain, and be careful with time boundaries.

correct grain
no double count
boundary handling


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Handle empty payloads

A webhook handler crashes when the JSON body is empty. Make it resilient and return a proper error.

Repo: mobile-sdk. Domain: creator-tools. Python service uses Pydantic models, DB repositories, and unit tests.

Instruction: Patch the bug described here: Handle empty payloads. Return a minimal safe fix and mention any tests to run.

Add input validation, preserve backward-compatible behavior, and include a regression test for the broken edge case.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design audit tables

Design tables for tracking API events and change history.

Repo: chat-agent. Domain: infra. Analytics schema design.

Instruction: Design the tables or schema for: Design audit tables. Define keys, partitions, and audit columns.

Use surrogate keys, timestamps, source metadata, and clear fact/dimension separation.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Given a Python Flask service with routes, services, and a DB layer, explain the request path for creating an order.

Repo: dashboard-web. Domain: developer-tools. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Map the flow of a request through the service. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

A FastAPI repo stores schema logic in one module and persistence in another. Locate where to add a new field safely.

Repo: scheduler. Domain: creator-tools. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Identify the file to change for feature X. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: analytics-core. Domain: saas. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace missing rows

A dashboard shows missing records after a timezone conversion.

Repo: analytics-core. Domain: saas. SQL pipeline and dashboard queries.

Instruction: Trace the data issue: Trace missing rows. Explain likely cause and how to verify the fix.

Check timezone conversion, join cardinality, and filters that remove expected rows.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design audit tables

Design tables for tracking API events and change history.

Repo: dashboard-web. Domain: saas. Analytics schema design.

Instruction: Design the tables or schema for: Design audit tables. Define keys, partitions, and audit columns.

Use surrogate keys, timestamps, source metadata, and clear fact/dimension separation.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write tests before implementation

Create unit tests for a discount calculator covering edge cases and rounding.

Repo: ml-pipeline. Domain: edtech. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Write tests before implementation. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Fix stale closure

A hook callback reads old state after rapid updates; patch it.

Repo: cms-platform. Domain: ecommerce. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Fix stale closure. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Handle empty payloads

A webhook handler crashes when the JSON body is empty. Make it resilient and return a proper error.

Repo: auth-service. Domain: edtech. Python service uses Pydantic models, DB repositories, and unit tests.

Instruction: Patch the bug described here: Handle empty payloads. Return a minimal safe fix and mention any tests to run.

Add input validation, preserve backward-compatible behavior, and include a regression test for the broken edge case.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Lock down behavior

Write tests for a password strength checker with explicit boundary conditions.

Repo: auth-service. Domain: healthtech. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Lock down behavior. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Test a formatter

Write tests for a date formatter that must respect locale and fallback rules.

Repo: mobile-sdk. Domain: healthtech. JS testing stack with Vitest/Jest and React Testing Library.

Instruction: Write test cases for: Test a formatter. Start with the edge cases and expected behavior.

Cover input validation, boundary values, async states, and error rendering.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Extract reusable hook

Refactor repeated fetch logic into a custom React hook.

Repo: chat-agent. Domain: fintech. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Extract reusable hook. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.

duplication removed
interface stable
tests updated


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: payments-api. Domain: infra. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Reduce duplication

The repo has repeated validation logic in three endpoints; centralize it.

Repo: dashboard-web. Domain: developer-tools. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Reduce duplication. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan migration checks

Inspect tables, compare counts, run a diff query, and validate migration impact.

Repo: ml-pipeline. Domain: saas. Agent workflow over SQL files and validation queries.

Instruction: Create a tool-use plan for: Plan migration checks. Read schema, inspect query, run checks, and validate output.

Inspect schema first, isolate the grain, run a comparison query, then verify counts after the patch.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Extract reusable hook

Refactor repeated fetch logic into a custom React hook.

Repo: chat-agent. Domain: developer-tools. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Extract reusable hook. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a memoized component

An over-memoized component hides actual prop changes.

Repo: ecommerce-backend. Domain: developer-tools. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review a memoized component. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a reporting query

The query is correct but slow due to an unbounded scan and unnecessary subquery.

Repo: analytics-core. Domain: edtech. SQL reporting and ETL jobs.

Instruction: Review the SQL for: Review a reporting query. Identify correctness and performance risks.

Flag full scans, unnecessary CTEs, non-sargable filters, and inconsistent joins.

performance risk
logic risk
clear recommendation


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Find hidden coupling

Inspect a Python package with utils, handlers, and workers; explain how retry logic affects job processing.

Repo: chat-agent. Domain: ecommerce. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Find hidden coupling. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.

correct entry point
correct data flow
relevant files identified


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: payments-api. Domain: healthtech. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify reducer logic

Reduce branching in a Redux reducer without changing behavior.

Repo: scheduler. Domain: saas. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Simplify reducer logic. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Analyze hydration mismatch

A server-rendered page renders different timestamps on client and server.

Repo: analytics-core. Domain: healthtech. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Analyze hydration mismatch. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a reporting query

The query is correct but slow due to an unbounded scan and unnecessary subquery.

Repo: cms-platform. Domain: saas. SQL reporting and ETL jobs.

Instruction: Review the SQL for: Review a reporting query. Identify correctness and performance risks.

Flag full scans, unnecessary CTEs, non-sargable filters, and inconsistent joins.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: analytics-core. Domain: ecommerce. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Locate data fetching boundaries

A Next.js repo separates server actions, client components, and shared utilities.

Repo: analytics-core. Domain: developer-tools. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Locate data fetching boundaries. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.

UI path identified
state flow understood
files mapped


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a memoized component

An over-memoized component hides actual prop changes.

Repo: mobile-sdk. Domain: fintech. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review a memoized component. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Find hidden coupling

Inspect a Python package with utils, handlers, and workers; explain how retry logic affects job processing.

Repo: scheduler. Domain: saas. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Find hidden coupling. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Locate data fetching boundaries

A Next.js repo separates server actions, client components, and shared utilities.

Repo: mobile-sdk. Domain: creator-tools. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Locate data fetching boundaries. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Split a large function

Refactor a 120-line data transformation function into small testable helpers.

Repo: scheduler. Domain: edtech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Split a large function. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify reducer logic

Reduce branching in a Redux reducer without changing behavior.

Repo: ml-pipeline. Domain: developer-tools. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Simplify reducer logic. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan release verification

Run lint, unit tests, packaging, and smoke checks before publishing.

Repo: cms-platform. Domain: saas. Release and verification scripts in bash.

Instruction: Build a tool-use plan for: Plan release verification. Include commands to inspect, run, and validate.

List the exact commands in order: inspect files, run targeted checks, then package and smoke test.

command order
verification
safe execution


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Fix duplicate aggregation

A query double-counts rows after joining two one-to-many tables.

Repo: analytics-core. Domain: ecommerce. SQL analytics pipeline with reporting queries.

Instruction: Fix the query issue: Fix duplicate aggregation. Explain the bug and provide the corrected pattern.

Deduplicate before aggregating, use correct grain, and be careful with time boundaries.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose promise flow

A promise chain swallows the original error and returns a misleading success.

Repo: ecommerce-backend. Domain: fintech. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Diagnose promise flow. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.

root cause
verification steps
frontend-specific diagnosis


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace a failing unit test

A test intermittently fails due to shared mutable state between cases.

Repo: payments-api. Domain: saas. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Trace a failing unit test. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.

root cause
debug steps
verification plan


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Sequence tool calls

Construct a tool-use plan for fixing an import error across multiple files.

Repo: payments-api. Domain: fintech. Agentic coding workflow with file reads, tests, and patches.

Instruction: Create a tool-use plan for: Sequence tool calls. Include the ideal sequence of read, edit, test, and verify actions.

Read the relevant file set, inspect failure output, patch the narrowest surface, rerun targeted tests, then broaden checks.

tool order sensible
minimal edit strategy
verification included


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Reduce duplication

The repo has repeated validation logic in three endpoints; centralize it.

Repo: auth-service. Domain: fintech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Reduce duplication. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: chat-agent. Domain: ecommerce. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: cms-platform. Domain: edtech. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.

bug fixed
safe boundary handling
regression test suggested


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Handle empty payloads

A webhook handler crashes when the JSON body is empty. Make it resilient and return a proper error.

Repo: auth-service. Domain: fintech. Python service uses Pydantic models, DB repositories, and unit tests.

Instruction: Patch the bug described here: Handle empty payloads. Return a minimal safe fix and mention any tests to run.

Add input validation, preserve backward-compatible behavior, and include a regression test for the broken edge case.

bug removed
edge case handled
regression test suggested


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: cms-platform. Domain: ecommerce. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.

clear contract
consistent errors
future-proof design


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose a race condition

Two concurrent requests occasionally overwrite each other in a cache-backed flow.

Repo: payments-api. Domain: edtech. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Diagnose a race condition. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Understand schema relationships

A warehouse schema uses fact and dimension tables for subscriptions and events.

Repo: payments-api. Domain: creator-tools. Data warehouse with fact/dimension tables and scheduled jobs.

Instruction: Explain the data flow for: Understand schema relationships. Identify tables, joins, and transformation steps.

Trace source tables to staging, then to marts. Identify key joins, filters, and aggregation points.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Lock down behavior

Write tests for a password strength checker with explicit boundary conditions.

Repo: dashboard-web. Domain: creator-tools. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Lock down behavior. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.

edge cases covered
test names clear
deterministic behavior


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace state across components

A React app manages auth state in context, hooks, and a small API layer.

Repo: auth-service. Domain: healthtech. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Trace state across components. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan release verification

Run lint, unit tests, packaging, and smoke checks before publishing.

Repo: auth-service. Domain: saas. Release and verification scripts in bash.

Instruction: Build a tool-use plan for: Plan release verification. Include commands to inspect, run, and validate.

List the exact commands in order: inspect files, run targeted checks, then package and smoke test.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Find hidden coupling

Inspect a Python package with utils, handlers, and workers; explain how retry logic affects job processing.

Repo: ecommerce-backend. Domain: infra. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Find hidden coupling. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: analytics-core. Domain: infra. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.

repetition reduced
error handling
maintainability


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review an API client

The client mixes transport errors and business errors in one catch block.

Repo: auth-service. Domain: healthtech. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review an API client. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.

quality issues found
practical suggestions
frontend concerns


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review an API client

The client mixes transport errors and business errors in one catch block.

Repo: ml-pipeline. Domain: edtech. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review an API client. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify a report query

Refactor a deeply nested CTE chain for readability.

Repo: ml-pipeline. Domain: ecommerce. SQL queries with layered CTEs.

Instruction: Refactor the query for: Simplify a report query. Make it easier to read without changing results.

Reduce nested CTE depth, standardize aliases, and keep one clear grain per step.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: scheduler. Domain: edtech. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review an API client

The client mixes transport errors and business errors in one catch block.

Repo: scheduler. Domain: edtech. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review an API client. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Analyze hydration mismatch

A server-rendered page renders different timestamps on client and server.

Repo: scheduler. Domain: developer-tools. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Analyze hydration mismatch. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review an API client

The client mixes transport errors and business errors in one catch block.

Repo: ecommerce-backend. Domain: infra. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review an API client. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Find hidden coupling

Inspect a Python package with utils, handlers, and workers; explain how retry logic affects job processing.

Repo: ecommerce-backend. Domain: saas. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Find hidden coupling. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Explain a stack trace

A KeyError appears in production when a field is absent in a nested payload.

Repo: ecommerce-backend. Domain: creator-tools. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Explain a stack trace. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: ecommerce-backend. Domain: edtech. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: cms-platform. Domain: creator-tools. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: dashboard-web. Domain: edtech. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Reduce duplication

The repo has repeated validation logic in three endpoints; centralize it.

Repo: payments-api. Domain: developer-tools. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Reduce duplication. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.

behavior preserved
complexity reduced
tests updated


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify a report query

Refactor a deeply nested CTE chain for readability.

Repo: chat-agent. Domain: fintech. SQL queries with layered CTEs.

Instruction: Refactor the query for: Simplify a report query. Make it easier to read without changing results.

Reduce nested CTE depth, standardize aliases, and keep one clear grain per step.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace a failing unit test

A test intermittently fails due to shared mutable state between cases.

Repo: ecommerce-backend. Domain: infra. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Trace a failing unit test. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: auth-service. Domain: fintech. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.

typed contract
clear ergonomics
extensibility


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write tests before implementation

Create unit tests for a discount calculator covering edge cases and rounding.

Repo: auth-service. Domain: developer-tools. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Write tests before implementation. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Test a formatter

Write tests for a date formatter that must respect locale and fallback rules.

Repo: ecommerce-backend. Domain: infra. JS testing stack with Vitest/Jest and React Testing Library.

Instruction: Write test cases for: Test a formatter. Start with the edge cases and expected behavior.

Cover input validation, boundary values, async states, and error rendering.

edge coverage
async behavior
clear expectations


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design a service interface

Propose a clean Python interface for a notification service supporting email and SMS.

Repo: cms-platform. Domain: infra. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Design a service interface. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a memoized component

An over-memoized component hides actual prop changes.

Repo: scheduler. Domain: ecommerce. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review a memoized component. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Extract reusable hook

Refactor repeated fetch logic into a custom React hook.

Repo: ecommerce-backend. Domain: saas. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Extract reusable hook. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.

duplication removed
interface stable
tests updated


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Split a large function

Refactor a 120-line data transformation function into small testable helpers.

Repo: scheduler. Domain: infra. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Split a large function. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design audit tables

Design tables for tracking API events and change history.

Repo: payments-api. Domain: fintech. Analytics schema design.

Instruction: Design the tables or schema for: Design audit tables. Define keys, partitions, and audit columns.

Use surrogate keys, timestamps, source metadata, and clear fact/dimension separation.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: auth-service. Domain: developer-tools. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify reducer logic

Reduce branching in a Redux reducer without changing behavior.

Repo: payments-api. Domain: ecommerce. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Simplify reducer logic. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write query tests

Create validation cases for a revenue query with month boundaries.

Repo: ml-pipeline. Domain: developer-tools. SQL validation and BI dashboards.

Instruction: Define tests/validation cases for: Write query tests. Include edge and boundary conditions.

Use small fixture tables and validate row counts, null handling, and date windows.

fixtures
edge cases
row-level expectations


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan rate limiting

Add a rate limiter design that can scale across multiple workers.

Repo: scheduler. Domain: ecommerce. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Plan rate limiting. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Fix duplicate aggregation

A query double-counts rows after joining two one-to-many tables.

Repo: ml-pipeline. Domain: infra. SQL analytics pipeline with reporting queries.

Instruction: Fix the query issue: Fix duplicate aggregation. Explain the bug and provide the corrected pattern.

Deduplicate before aggregating, use correct grain, and be careful with time boundaries.

correct grain
no double count
boundary handling


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Improve readability

Rename ambiguous variables and simplify nested conditionals in a config loader.

Repo: cms-platform. Domain: saas. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Improve readability. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Explain a stack trace

A KeyError appears in production when a field is absent in a nested payload.

Repo: cms-platform. Domain: fintech. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Explain a stack trace. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a cache helper

A cache wrapper forgets to namespace keys and can collide across tenants.

Repo: auth-service. Domain: infra. Python backend with API handlers and background workers.

Instruction: Review the code for: Review a cache helper. Call out risks and give a practical improvement plan.

Flag correctness, performance, maintainability, and security concerns. Recommend the smallest safe refactor.

risk identified
actionable fix
production awareness


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify a report query

Refactor a deeply nested CTE chain for readability.

Repo: analytics-core. Domain: edtech. SQL queries with layered CTEs.

Instruction: Refactor the query for: Simplify a report query. Make it easier to read without changing results.

Reduce nested CTE depth, standardize aliases, and keep one clear grain per step.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Lock down behavior

Write tests for a password strength checker with explicit boundary conditions.

Repo: ml-pipeline. Domain: developer-tools. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Lock down behavior. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

A FastAPI repo stores schema logic in one module and persistence in another. Locate where to add a new field safely.

Repo: cms-platform. Domain: fintech. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Identify the file to change for feature X. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.

correct entry point
correct data flow
relevant files identified


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan rate limiting

Add a rate limiter design that can scale across multiple workers.

Repo: ml-pipeline. Domain: infra. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Plan rate limiting. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: scheduler. Domain: creator-tools. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace state across components

A React app manages auth state in context, hooks, and a small API layer.

Repo: ml-pipeline. Domain: infra. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Trace state across components. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.

UI path identified
state flow understood
files mapped


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify reducer logic

Reduce branching in a Redux reducer without changing behavior.

Repo: analytics-core. Domain: creator-tools. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Simplify reducer logic. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define a failing test suite

Produce tests for a CSV importer that must reject malformed rows.

Repo: payments-api. Domain: developer-tools. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Define a failing test suite. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace state across components

A React app manages auth state in context, hooks, and a small API layer.

Repo: analytics-core. Domain: healthtech. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Trace state across components. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Locate data fetching boundaries

A Next.js repo separates server actions, client components, and shared utilities.

Repo: chat-agent. Domain: ecommerce. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Locate data fetching boundaries. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: ecommerce-backend. Domain: developer-tools. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: payments-api. Domain: edtech. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify reducer logic

Reduce branching in a Redux reducer without changing behavior.

Repo: cms-platform. Domain: edtech. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Simplify reducer logic. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: analytics-core. Domain: infra. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write query tests

Create validation cases for a revenue query with month boundaries.

Repo: ml-pipeline. Domain: edtech. SQL validation and BI dashboards.

Instruction: Define tests/validation cases for: Write query tests. Include edge and boundary conditions.

Use small fixture tables and validate row counts, null handling, and date windows.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: chat-agent. Domain: infra. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Split a large function

Refactor a 120-line data transformation function into small testable helpers.

Repo: chat-agent. Domain: infra. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Split a large function. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Given a Python Flask service with routes, services, and a DB layer, explain the request path for creating an order.

Repo: auth-service. Domain: infra. Python service with app/, services/, repositories/, tests/.

Instruction: Explain how this codebase handles the task: Map the flow of a request through the service. Identify the files and modules most likely involved.

1. Start at the route/controller.
2. Follow service layer calls.
3. Check repository and schema modules.
4. Verify tests that cover the flow.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace state across components

A React app manages auth state in context, hooks, and a small API layer.

Repo: analytics-core. Domain: creator-tools. React/Node codebase with components, hooks, and API clients.

Instruction: Explain the code path for: Trace state across components. Point out likely components, hooks, or services.

Follow the UI event, state update, API call, and render path. Identify shared utilities and tests.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Improve readability

Rename ambiguous variables and simplify nested conditionals in a config loader.

Repo: ecommerce-backend. Domain: edtech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Improve readability. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Explain a stack trace

A KeyError appears in production when a field is absent in a nested payload.

Repo: dashboard-web. Domain: infra. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Explain a stack trace. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.

root cause
debug steps
verification plan


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose a race condition

Two concurrent requests occasionally overwrite each other in a cache-backed flow.

Repo: cms-platform. Domain: infra. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Diagnose a race condition. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a serializer

The serializer leaks internal IDs in API responses; propose a cleaner contract.

Repo: ecommerce-backend. Domain: fintech. Python backend with API handlers and background workers.

Instruction: Review the code for: Review a serializer. Call out risks and give a practical improvement plan.

Flag correctness, performance, maintainability, and security concerns. Recommend the smallest safe refactor.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write query tests

Create validation cases for a revenue query with month boundaries.

Repo: cms-platform. Domain: healthtech. SQL validation and BI dashboards.

Instruction: Define tests/validation cases for: Write query tests. Include edge and boundary conditions.

Use small fixture tables and validate row counts, null handling, and date windows.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Test a formatter

Write tests for a date formatter that must respect locale and fallback rules.

Repo: auth-service. Domain: healthtech. JS testing stack with Vitest/Jest and React Testing Library.

Instruction: Write test cases for: Test a formatter. Start with the edge cases and expected behavior.

Cover input validation, boundary values, async states, and error rendering.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose build failure

A CI script fails because one command exits early and hides the root cause.

Repo: ecommerce-backend. Domain: creator-tools. CI scripts, release automation, and shell helpers.

Instruction: Diagnose this shell failure: Diagnose build failure. Explain the failure point and the safest fix.

Check exit codes, quote variables, and make failure handling explicit with set -euo pipefail when appropriate.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: mobile-sdk. Domain: edtech. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: scheduler. Domain: ecommerce. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Test a formatter

Write tests for a date formatter that must respect locale and fallback rules.

Repo: auth-service. Domain: ecommerce. JS testing stack with Vitest/Jest and React Testing Library.

Instruction: Write test cases for: Test a formatter. Start with the edge cases and expected behavior.

Cover input validation, boundary values, async states, and error rendering.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: ml-pipeline. Domain: creator-tools. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write query tests

Create validation cases for a revenue query with month boundaries.

Repo: dashboard-web. Domain: fintech. SQL validation and BI dashboards.

Instruction: Define tests/validation cases for: Write query tests. Include edge and boundary conditions.

Use small fixture tables and validate row counts, null handling, and date windows.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: analytics-core. Domain: ecommerce. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Improve readability

Rename ambiguous variables and simplify nested conditionals in a config loader.

Repo: ecommerce-backend. Domain: healthtech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Improve readability. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: scheduler. Domain: developer-tools. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a cache helper

A cache wrapper forgets to namespace keys and can collide across tenants.

Repo: scheduler. Domain: developer-tools. Python backend with API handlers and background workers.

Instruction: Review the code for: Review a cache helper. Call out risks and give a practical improvement plan.

Flag correctness, performance, maintainability, and security concerns. Recommend the smallest safe refactor.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: ecommerce-backend. Domain: ecommerce. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Guard null props

A component crashes when optional props are missing.

Repo: chat-agent. Domain: creator-tools. React/Next.js application with hooks and server/client boundaries.

Instruction: Fix this bug: Guard null props. Keep the change minimal and safe.

Guard missing values, avoid stale state, and keep server/client-only logic in the right layer.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: auth-service. Domain: edtech. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Reduce duplication

The repo has repeated validation logic in three endpoints; centralize it.

Repo: cms-platform. Domain: healthtech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Reduce duplication. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a cache helper

A cache wrapper forgets to namespace keys and can collide across tenants.

Repo: dashboard-web. Domain: healthtech. Python backend with API handlers and background workers.

Instruction: Review the code for: Review a cache helper. Call out risks and give a practical improvement plan.

Flag correctness, performance, maintainability, and security concerns. Recommend the smallest safe refactor.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan migration checks

Inspect tables, compare counts, run a diff query, and validate migration impact.

Repo: analytics-core. Domain: saas. Agent workflow over SQL files and validation queries.

Instruction: Create a tool-use plan for: Plan migration checks. Read schema, inspect query, run checks, and validate output.

Inspect schema first, isolate the grain, run a comparison query, then verify counts after the patch.

schema first
comparison query
verification


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose build failure

A CI script fails because one command exits early and hides the root cause.

Repo: chat-agent. Domain: ecommerce. CI scripts, release automation, and shell helpers.

Instruction: Diagnose this shell failure: Diagnose build failure. Explain the failure point and the safest fix.

Check exit codes, quote variables, and make failure handling explicit with set -euo pipefail when appropriate.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan verify-edit cycle

Read component files, edit the smallest surface, run tests, and summarize outcome.

Repo: dashboard-web. Domain: fintech. Agent workflow over frontend files, tests, and build output.

Instruction: Create a tool plan for: Plan verify-edit cycle. Include inspect, edit, test, and verify steps.

Open the minimal file set, edit the affected component or hook, run targeted tests, then confirm build health.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design audit tables

Design tables for tracking API events and change history.

Repo: ecommerce-backend. Domain: edtech. Analytics schema design.

Instruction: Design the tables or schema for: Design audit tables. Define keys, partitions, and audit columns.

Use surrogate keys, timestamps, source metadata, and clear fact/dimension separation.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Analyze hydration mismatch

A server-rendered page renders different timestamps on client and server.

Repo: dashboard-web. Domain: creator-tools. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Analyze hydration mismatch. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.

root cause
verification steps
frontend-specific diagnosis


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Improve readability

Rename ambiguous variables and simplify nested conditionals in a config loader.

Repo: scheduler. Domain: edtech. Python codebase with repeated helpers and service objects.

Instruction: Refactor the following situation: Improve readability. Preserve behavior and reduce complexity.

Extract helpers, keep public API stable, add/adjust tests, and avoid mixing business logic with I/O.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: mobile-sdk. Domain: fintech. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Extract reusable hook

Refactor repeated fetch logic into a custom React hook.

Repo: cms-platform. Domain: healthtech. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Extract reusable hook. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Test a formatter

Write tests for a date formatter that must respect locale and fallback rules.

Repo: mobile-sdk. Domain: edtech. JS testing stack with Vitest/Jest and React Testing Library.

Instruction: Write test cases for: Test a formatter. Start with the edge cases and expected behavior.

Cover input validation, boundary values, async states, and error rendering.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a memoized component

An over-memoized component hides actual prop changes.

Repo: auth-service. Domain: infra. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review a memoized component. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Explain a stack trace

A KeyError appears in production when a field is absent in a nested payload.

Repo: auth-service. Domain: fintech. Python service with logs, stack traces, and tests.

Instruction: Diagnose this failure: Explain a stack trace. Provide the most likely cause and the verification steps.

Read the stack trace, identify the failing boundary, isolate shared state or missing key paths, then add a regression test.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify a report query

Refactor a deeply nested CTE chain for readability.

Repo: payments-api. Domain: saas. SQL queries with layered CTEs.

Instruction: Refactor the query for: Simplify a report query. Make it easier to read without changing results.

Reduce nested CTE depth, standardize aliases, and keep one clear grain per step.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: scheduler. Domain: creator-tools. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Lock down behavior

Write tests for a password strength checker with explicit boundary conditions.

Repo: ml-pipeline. Domain: ecommerce. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Lock down behavior. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Handle empty payloads

A webhook handler crashes when the JSON body is empty. Make it resilient and return a proper error.

Repo: payments-api. Domain: saas. Python service uses Pydantic models, DB repositories, and unit tests.

Instruction: Patch the bug described here: Handle empty payloads. Return a minimal safe fix and mention any tests to run.

Add input validation, preserve backward-compatible behavior, and include a regression test for the broken edge case.

bug removed
edge case handled
regression test suggested


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify reducer logic

Reduce branching in a Redux reducer without changing behavior.

Repo: cms-platform. Domain: fintech. React components and shared logic in a frontend repo.

Instruction: Refactor the following: Simplify reducer logic. Reduce duplication and keep the public interface stable.

Extract a hook or utility, preserve props and return shape, and add tests around behavior.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Lock down behavior

Write tests for a password strength checker with explicit boundary conditions.

Repo: ml-pipeline. Domain: healthtech. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Lock down behavior. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose build failure

A CI script fails because one command exits early and hides the root cause.

Repo: ecommerce-backend. Domain: infra. CI scripts, release automation, and shell helpers.

Instruction: Diagnose this shell failure: Diagnose build failure. Explain the failure point and the safest fix.

Check exit codes, quote variables, and make failure handling explicit with set -euo pipefail when appropriate.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify a report query

Refactor a deeply nested CTE chain for readability.

Repo: analytics-core. Domain: fintech. SQL queries with layered CTEs.

Instruction: Refactor the query for: Simplify a report query. Make it easier to read without changing results.

Reduce nested CTE depth, standardize aliases, and keep one clear grain per step.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write query tests

Create validation cases for a revenue query with month boundaries.

Repo: payments-api. Domain: healthtech. SQL validation and BI dashboards.

Instruction: Define tests/validation cases for: Write query tests. Include edge and boundary conditions.

Use small fixture tables and validate row counts, null handling, and date windows.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Write tests before implementation

Create unit tests for a discount calculator covering edge cases and rounding.

Repo: payments-api. Domain: creator-tools. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Write tests before implementation. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: cms-platform. Domain: saas. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.

clear contract
consistent errors
future-proof design


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review an API client

The client mixes transport errors and business errors in one catch block.

Repo: scheduler. Domain: healthtech. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review an API client. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Coordinate verification

Describe a tool sequence that verifies lint, unit tests, and type checks.

Repo: auth-service. Domain: infra. Agentic coding workflow with file reads, tests, and patches.

Instruction: Create a tool-use plan for: Coordinate verification. Include the ideal sequence of read, edit, test, and verify actions.

Read the relevant file set, inspect failure output, patch the narrowest surface, rerun targeted tests, then broaden checks.

tool order sensible
minimal edit strategy
verification included


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review an async worker

An async task uses blocking I/O in the event loop; suggest a safer pattern.

Repo: chat-agent. Domain: healthtech. Python backend with API handlers and background workers.

Instruction: Review the code for: Review an async worker. Call out risks and give a practical improvement plan.

Flag correctness, performance, maintainability, and security concerns. Recommend the smallest safe refactor.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: ecommerce-backend. Domain: healthtech. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Diagnose promise flow

A promise chain swallows the original error and returns a misleading success.

Repo: ecommerce-backend. Domain: healthtech. Frontend app with hydration and async data flow.

Instruction: Diagnose the issue: Diagnose promise flow. Explain likely cause and how to verify the fix.

Check server/client output mismatches, stale closures, promise handling, and state synchronization.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Design client methods

Design a TypeScript client for search, pagination, and retries.

Repo: ml-pipeline. Domain: infra. TypeScript client or Node API layer.

Instruction: Design a TypeScript API for: Design client methods. Define method names, inputs, and return types.

Prefer explicit types, typed errors, pagination support, and composable options objects.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan migration checks

Inspect tables, compare counts, run a diff query, and validate migration impact.

Repo: chat-agent. Domain: infra. Agent workflow over SQL files and validation queries.

Instruction: Create a tool-use plan for: Plan migration checks. Read schema, inspect query, run checks, and validate output.

Inspect schema first, isolate the grain, run a comparison query, then verify counts after the patch.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace missing rows

A dashboard shows missing records after a timezone conversion.

Repo: scheduler. Domain: developer-tools. SQL pipeline and dashboard queries.

Instruction: Trace the data issue: Trace missing rows. Explain likely cause and how to verify the fix.

Check timezone conversion, join cardinality, and filters that remove expected rows.

root cause
data verification
metric consistency


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify a report query

Refactor a deeply nested CTE chain for readability.

Repo: scheduler. Domain: edtech. SQL queries with layered CTEs.

Instruction: Refactor the query for: Simplify a report query. Make it easier to read without changing results.

Reduce nested CTE depth, standardize aliases, and keep one clear grain per step.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Lock down behavior

Write tests for a password strength checker with explicit boundary conditions.

Repo: mobile-sdk. Domain: saas. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Lock down behavior. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.

edge cases covered
test names clear
deterministic behavior


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define a failing test suite

Produce tests for a CSV importer that must reject malformed rows.

Repo: ml-pipeline. Domain: healthtech. Python package with pytest and typed functions.

Instruction: Write a test-first plan for: Define a failing test suite. Include the key test cases before implementation.

Cover happy path, invalid input, boundaries, and failure modes. Keep tests deterministic and small.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a reporting query

The query is correct but slow due to an unbounded scan and unnecessary subquery.

Repo: mobile-sdk. Domain: creator-tools. SQL reporting and ETL jobs.

Instruction: Review the SQL for: Review a reporting query. Identify correctness and performance risks.

Flag full scans, unnecessary CTEs, non-sargable filters, and inconsistent joins.

performance risk
logic risk
clear recommendation


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Define response shapes

Design consistent API responses for success, validation errors, and server errors.

Repo: scheduler. Domain: creator-tools. Python backend exposing JSON APIs.

Instruction: Design the API/contract for: Define response shapes. Define inputs, outputs, errors, and extensibility points.

Use explicit request/response schemas, stable error shapes, and version-friendly naming.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Trace missing rows

A dashboard shows missing records after a timezone conversion.

Repo: analytics-core. Domain: saas. SQL pipeline and dashboard queries.

Instruction: Trace the data issue: Trace missing rows. Explain likely cause and how to verify the fix.

Check timezone conversion, join cardinality, and filters that remove expected rows.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Plan a repair loop

The agent should read files, run tests, inspect failures, patch code, and re-run checks.

Repo: dashboard-web. Domain: ecommerce. Agentic coding workflow with file reads, tests, and patches.

Instruction: Create a tool-use plan for: Plan a repair loop. Include the ideal sequence of read, edit, test, and verify actions.

Read the relevant file set, inspect failure output, patch the narrowest surface, rerun targeted tests, then broaden checks.


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Simplify script logic

Refactor a long shell script into functions with clearer error handling.

Repo: ml-pipeline. Domain: saas. Bash automation with functions and environment variables.

Instruction: Refactor the script for: Simplify script logic. Reduce repetition and improve error handling.

Extract functions, use strict mode carefully, and keep reusable command pieces in variables.

repetition reduced
error handling
maintainability


JumpTrace-3K — Agentic Coding Traces for Modern Software Engineering

Review a memoized component

An over-memoized component hides actual prop changes.

Repo: dashboard-web. Domain: edtech. Frontend app with shared utilities and API wrappers.

Instruction: Review the implementation for: Review a memoized component. Comment on correctness, UX, and maintainability.

Look for async race conditions, unnecessary re-renders, error handling gaps, and accessibility issues.

quality issues found
practical suggestions
frontend concerns